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以间苯二酚(R)和糠醛(F)为反应物,以四氮六甲胺(H)为催化剂,在异丙醇(I)溶剂中采用溶胶-凝胶方法制备出RF有机气凝胶,通过常压干燥和氮气保护烧结碳化后,制得炭干凝胶(CXs)。采用三水平三因素正交优化法实现制备工艺参数的正交优化。采用SEM、XRD、FR-IR和N_2吸附法对CXs进行表征和分析。正交优化结果表明,R/F(摩尔比)=0.7、R/H(摩尔比)=25、P/I(体积比)=0.07为最优工艺参数。制得的CXs最低密度仅为0.083g/cm~3。FR-IR表明:-CH_2和CH_2-O-CH2是RF有机气凝胶纳米结构产生的主要基团。XRD分析表明:CXs的碳结构呈现微小晶体的非晶态。CXs是典型的介孔材料,其比表面积在550~800 m~2/g之间,平均孔径为2~9 nm。
The RF organic airgel was prepared by sol-gel method in isopropanol (I) solvent using resorcinol (R) and furfural (F) as reactants and tetramethylnitrosamine (H) , After drying under atmospheric pressure and sintering nitrogen carbonized gel (CXs). Orthogonal Optimization of Preparation Process Parameters by Three Three - level Orthogonal Optimization. The CXs were characterized and analyzed by SEM, XRD, FR-IR and N 2 adsorption. Orthogonal optimization results showed that R / F = 0.7, R / H = 25 and P / I = 0.07 were the optimal parameters. The lowest density of CXs obtained was only 0.083g / cm ~ 3. FR-IR indicates that -CH 2 and CH 2 -O-CH 2 are the major groups produced by the RF organic airgel nanostructures. XRD analysis shows that the carbon structure of CXs is amorphous in the form of tiny crystals. CXs is a typical mesoporous material with a specific surface area of 550-800 m 2 / g and an average pore size of 2-9 nm.